'use strict'
// 打包时候的配置文件

// 导入path模块
const path = require('path')
// 加载配置文件---> setting.js
const defaultSettings = require('./src/settings.js')

// 将传入的路径变成绝对路径
function resolve(dir) {
  return path.join(__dirname, dir)
}

const name = defaultSettings.title || 'vue Admin Template' // page title

// 设置端口号
const port = process.env.port || process.env.npm_config_port || 9528 // dev port

// vue-cli脚手架相关的配置
module.exports = {
  // 设置打包后的静态资源目录可以访问的方式
  /*
    - '/': 以服务器的方式才能打开里面的静态文件
    - './': 可以使用相对路径的方式访问里面的静态文件
  */
  publicPath: process.env.NODE_ENV === 'development' ? '/' : './',
  // 打包输出目录
  outputDir: 'dist',
  // 静态资源的输出目录
  assetsDir: 'static',
  // 是否开启eslint保存检测
  lintOnSave: process.env.NODE_ENV === 'development',
  // 关闭map文件
  productionSourceMap: false,
  // 服务器的相关配置
  devServer: {
    // 设置端口号
    port: port,
    // 自动打开浏览器
    open: true,
    // eslint 检测代码出错或者警告登录是否在浏览器显示
    overlay: {
      warnings: false,
      errors: true
    },
    // 在启动服务器之前加载mock服务
    // before: require('./mock/mock-server.js')

    // 代理配置
    proxy: {
      // 如果请求地址以/api打头，就触发代理机制
      '/api': {
        // target: 'http://192.168.81.134:3000' // 我们要代理的真是接口地址
        // target: 'http://192.168.81.146:3000/'
        target: 'http://192.168.81.170:8888/'
      }
    }
  },

  // webpack[对象配置]
  configureWebpack: {
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    }
  },

  // webpack[函数配置]
  chainWebpack(config) {
    // it can improve the speed of the first screen, it is recommended to turn on preload
    config.plugin('preload').tap(() => [
      {
        rel: 'preload',
        // to ignore runtime.js
        // https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/cli-service/lib/config/app.js#L171
        fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/],
        include: 'initial'
      }
    ])

    // when there are many pages, it will cause too many meaningless requests
    config.plugins.delete('prefetch')

    // set svg-sprite-loader
    config.module.rule('svg').exclude.add(resolve('src/icons')).end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()

    config.when(process.env.NODE_ENV !== 'development', (config) => {
      config
        .plugin('ScriptExtHtmlWebpackPlugin')
        .after('html')
        .use('script-ext-html-webpack-plugin', [
          {
            // `runtime` must same as runtimeChunk name. default is `runtime`
            inline: /runtime\..*\.js$/
          }
        ])
        .end()
      config.optimization.splitChunks({
        chunks: 'all',
        cacheGroups: {
          libs: {
            name: 'chunk-libs',
            test: /[\\/]node_modules[\\/]/,
            priority: 10,
            chunks: 'initial' // only package third parties that are initially dependent
          },
          elementUI: {
            name: 'chunk-elementUI', // split elementUI into a single package
            priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
            test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
          },
          commons: {
            name: 'chunk-commons',
            test: resolve('src/components'), // can customize your rules
            minChunks: 3, //  minimum common number
            priority: 5,
            reuseExistingChunk: true
          }
        }
      })
      // https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
      config.optimization.runtimeChunk('single')
    })
  }
}
